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What is CLFS?


CLFS.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if CLFS.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for CLFS drivers in need of updating

CLFS.sys file information

The process known as Common Log File System Driver belongs to software Microsoft Windows Operating System by Microsoft (www.microsoft.com).

Description: The original CLFS.sys is an important part of Windows and rarely causes problems. CLFS.sys is located in the C:\Windows\System32 folder. Known file sizes on Windows 8/7/XP are 247,352 bytes (60% of all occurrences) or 221,800 bytes. http://www.file.net/process/clfs.sys.html 
The driver can be started or stopped from Services in the Control Panel or by other programs. The file is a Windows system file. It is a Microsoft signed file. The program has no visible window. The CLFS.sys file is certified by a trustworthy company. CLFS.sys appears to be a compressed file. Therefore the technical security rating is 0% dangerous.

Recommended: Identify CLFS.sys related errors

Important: Some malware camouflages itself as CLFS.sys. Therefore, you should check the CLFS.sys process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.

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Best practices for resolving CLFS issues

A clean and tidy computer is the key requirement for avoiding problems with CLFS. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off doing a repair of your installation, or in the case of Windows 8, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the CLFS.sys process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.



Other processes

CLFS.sys [all]